Looks like i was mistaken on 2 out of three:
E-plenish.com
"The goods must be unopened, with the manufacturers seals intact and in perfect re-saleable condition All goods returned in these circumstances (except where the Consumer Protection (Distance Selling) Regulations 2000 apply, see Clause 13) will be subject to a 25% re-stocking fee of E-PLENISH's sale price for the goods."
novatech.co.uk
"The seller reserves the right to make a handling and restocking charge of 25% on goods which are returned if they were ordered in error or are no longer required."
misco.co.uk
"The Goods must be unopened, with the manufacturers’ seals intact and in perfect re-saleable condition. All Goods returned in these circumstances will not be subject to a re-stocking fee."